Machine for grinding sheaves



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H. C. STIFEL.

MACHINE FOR GRINDING SHEAVBS, &c.

' No. 409,254. Patented Aug. 20.1889.

E91 mi@ D A J'fj' l ii. "um uml `(No Model.) 8 Sheets--S'heet 12. H. G.STIFBL. MACHINE POR GRINDING SHEAVES, &o.

Patented Aug. 20, 1889.

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VH. C. STIPEL-` MACHINE POR GRINDING SHBAVBS, 6m. No. 409,254. PatentedAug. 20, 1889.

(No Model.)

es' @Ma (No Model.) 8 Sheets-Sheet 4.

H. C. STIPEL. MAGHINB Poi; GRINDING SHEAVBS, 50.

No. 409,254. Patented Aug. 20, 1889.

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N PETERS, mammography. wumnman. mc.

(No Model.) 8 Sheets-Sheet 5. H. C. STIPEL. MACHINE FOR GRINDINGSHEAVBS, &o. ,254.

Patnted Au (No Model.) 8 Sheets-Sheet 6.

H. C. STIPEL. MAGHINB PoR GRINDING SHEAVES.' aw.

No. 409,254. Patented Aug. 20, 1889I 7J-2 Venter;

NV PETERS Plawllhogmpher. washington, n.6,

(No Model.) s sheets-sheet '2.

H. C. STIPEL.

MACHINE POR GRINDING SHBAVES, sw. No. 409,254. Patented Aug. 20, 1889.

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(No Model.) 8 S'h@ets--Shee'I 8.

ELC. STIPEL. MACHINE FOR GRINDING SHBAVBS, m. No. 409,254. Patented Aug.20, 1889.

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&M l m www? N. PETERS Fholaulhugmpher. washington. D: c.

UNITED STATES PATENT OEEICE.

HERMAN O. STIFEL, OF ST. LOUIS, MISSOURI.

MACHINE FOR GRINDING SHEAVES, @4.0.

SPECIFICATION forming part of Letters Patent No. 409,254, dated August20, 1889. Application filed November 27, 1888.` Serial No. 292,010. (Nomodel.)

To all whom, t may concern..-

Be it known that I, HERMAN C. STIFEL, of St. Louis, Missouri, have madea new and useful Improvement in Machines for Grinding Shcaves andAnalogous Articles, of which the ollowin gis a 'f ull, clear, an d exactdescription.

Considered generally, the improved mechanism is constructed and operatedsubstantially as follows:

The sheaves to be ground are delivered into a hopper at the upper end ofthe machine. From the hopper the sheaves are fed successively downwardinto a chute. As each sheave arrives at the lower end of the chute, itis clamped laterally and subjected to the action of the grindingmechanism, which is designed to act upon the peripheral portion of thesheave, and to enable the entire peripheral portion to be presented tothe grinding mechanism the sheave and its clamp are rotated during thegrinding. After the sheaves are ground they are discharged from themachin e, and as a finished sheave is discharged an unfinished one takesits place, to be acted upon by tv he grinding mechanism.

The capacity Q f the machine is increased by employing a series ofgrinding apparatuses in the place of a single one, all substantially asis hereinafter set forth and claimed, aided by the annexed drawings,making part of this speciication, in which- Figure 1 is an elevation ofthe improved machine, portions thereof being broken away and not shownto enable the remaining portions to be more readily understood; Fig. 2,a plan of the machine; Fig. 3, a central vertical section of theprincipal portion of the frame-work of the machine; Fig. 4, a horizontalsection on the line el I of Fig. 3; Fig. 5, a vertical section of one ofthe chutes and grinding mechanisms,the view including the adjacentparts; Fig. (5, a vertical section on the line 6 G of Fig. 5; Fig. 7, anedge elevation of the upper portion of one of the chutes; Fig. 8, a sideelevation of the chute, a portion of the wall being broken away; Fig. 9,a vertical section on the line 9 9 of Fig. 5; Fig. 10, a side elevationof one of the wheel-supporting arms of one of the grinding mechanisms;Fig. 11, a side elevation of the other wheel-supporting arm; Fig. 12, anelevation of one of the brackets used to support the sheaveclampingmechanisms; Fig. 13, a section on the line 1,3 15 of Fig. 9; Fig. 14, aplan of the bracket-chain in Fig. 12; Fig. 15, a section on the line 1315 of Fig. 9, showing the parts in a different position from that ofFig. 13; Fig. 16, a vertical section showing the parts immediately usedin operating the rock-shaft that is employed in opening the grindingwheel arms apart; Fig. 17, a plan of the box which receives the inner endof the arm used in operating the movable part of the sheaveclampingmechanism; Fig. 1S, a view in perspective of the cam used in moving inan outward direction the boX of Fig. 17; Fig. 19, a front elevation ofthe parts of Figs. 17 and 18 shown together; Fig. 20, .a side elevationof the bracket for the hand-wheel used in adjusting the grinding-wheelarms when the wheels are worn; Fig. 21, a front elevation` of the same;Fig. Y22, a side elevatioirof the hand-wheel and worin-shaft used in thebracket of Figs. 2O and 21; Fig. 23, an end elevation of the saine; Fig.24, a vertical section of the hopper at one of the chutes; 25, a.

side elevation of a pair of grinding-wheels and showing a sheave4 inposition for being ground; Fig. 26, an elevation of the mechanism fordriving the various mechanisms of the machine; Fig. 27, a Verticalsection on the line 27 27 of Fig. 26.

The views are upon various scales.

The same letters of reference denote the same parts.

The hoppen-At the upper part of the machine is the hopper A, Figs. l, 3,5, and 24, for receivingthe sheaves tobe ground. Its bottoni d iscrowned to facilitate the delivery of the sheaves B,Figs. 13, 5, S, and25, into the chutes O, Figs. 1, 3, 4, 5, 7, and S, and to insure thetransfer of the sheaves a stirring device D, Figs. 2, 3, and 5, isemployed. This device consists, essentially, of a series of iingers d dd, &c., attached to a frame, by means of which the iingers are movedaround within the hopper and in contact with the sheaves therein, and soas to urge them in the direction of the chutes. A desirable frame isthat shown inthe drawings. The fingers at different distancesrespectivelyfrom the wheelcenter are attached respectively to the spokesd of a wheel arranged horizontally above the hopper and to turn on abearing d2 upon the upper end of IOO the vertical shaft E, and at itsperiphery provided with teeth cl3, to enable it to engage With and bedriven by a pinion D', which is fast upon an upright shaft F.

The chutes-A series of chutes are preferably employed. In the presentinstance there are twelve chutes arranged to forni a circular seriesextending around the machine. They are shaped in cross-section toreceive and to guide the sheaves in an upright position, Figs. 5 and S,downward, and to deliver them successively to the clamping mechanism,Figs. l and 5, belonging to the chute, for with each chute is a completemechanism for holding the sheaves and grinding them and then dischargingthem from the machine.

The clamping mechanism is the means for holding and rotating the sheaveas it is being ground. To this end the sheave is clamped sidewise and soas to expose its peripheral portion, and as follows: G represents ashaft journaled in bearings g g, provided at its inner end with abevel-pinion g, and at its outer end g2 adapted to form a shoulderagainst which the sheave can be pressed laterally when it has dropped tothe lower end of the chute. G represents another shaft journaled at g3in the bracket g4, and having its inner end projecting through anopening` g5, Figs. 5 and 8,in the lower end of the chute, and at itsextreme inner end g shaped to enter the central opening b in the sheaveand be pressed snugly thereinto. In Fig. 5 the shaft G is shown pressedendwise against the sheave, and the sheave thtreby pressed against theshaft G. When the shcave is thus held, it is caused to rotate with theshafts G G. The shaft G is driven by means of the horizontal bevel-gearII, Figs. 1, 3, li, and 5, and while the sheave can be rotated to someextent when the shaft G only is driven, and the shaft G is used only asa means for producing lateral pressure upon the sheave, it is better tohave both of the shafts G G driven, and driven uniformly. Accordinglythe shaft G is provided with a gear g7, which engages with and drives agear g8 upon a shaft g, Fig. 1. This last-named shaft is held andadapted to be rotated in bearings gm, Fig. 4, and at its outer endprovided with a gear g, which engages with a gear Q12 upon the shaft G.By reason of this construction the shaft G is caused to follow the shaftG in its rotation. Vhen it is desired to release the sheave, the shaft Gis moved endwise away from the shaft sufficiently for the inner end ofshaft G to clear the sheave, whereupon the sheave can drop out of theclamp. The means adapted for thus moving the shaft G are as follows: Thegear II is provided with a cam 7L, Figs. 5, 18, and 19, which as thegear Il rotates encounters a roller h', Figs. 1, 5, and 19, upon a studh2, which is held in a box h3, and thereby moves the box outwardly inthe machine. The box is secured to the inner end of the shaft g, andalso to the inner end of an arm gm, which passes outward throughbearings gl'l g, and

atits outer end supports the bracket g4. The parts Q9 and gM are movedoutwardly with the box h3, and the sheave thereby released. As soon asvthe cam h passes the roller h the spring Q15, Figs. l and 5, which atits inner end g1 is secured to the frame of the machine and at its outerend g1'T to the box h3, acts to draw the box h3 and the parts Q9 Q13inwardly into their original position and to effect the clamping of thenext sheave. i

T he grinding mcc7tam'sm.'l`lie parts constituting the grindingmechanism are shown in Figs. 1, 2, a, 9, 10, 11, 13, 15, and 25. Theparts which do the actual grinding are the emery-wheels I and I. Thewheel I is used for grinding the concave portion of the face of thesheaves and the wheel I for grinding the sheave-face at each side of thegroove. To enable the wheels to be closed against the sheave when it isdesired to grind it and to be opened away from the sheave when it isdesired to release the sheave, the wheels are respectively j ournaled inthe arms I2 I3 at the lower end z` thereof and the arms in turn, and atthe upper end t" thereof are journaled side by side upon a bearing 712,arranged toward the upper part of the machine. By swinging the arms I2I3 upon their bearing the wheels I I can be adjusted for the purposesmentioned. The arms are closed toward each other by means of the springi3, Fig. 9, which serves to elastically unite the arms, and to open thearms apart the cam 1'", Fig. 9, is employed. The cam is fastened uponthe rock-shaft i5, Figs. 9, 1, 5, and 16, by oscillating which the camcan be turned to open the arms I2 I3 apart and allow them to closetoward each other. The rock-shaft is journaled in suitable bearings i,Figs. l, 5, and 16, and it is operated as follows: The rock-shaft isprovided with a crank t7. A connecting-rod 'is leads from the crank i7to a bell-crank lever ifwhich is at lo pivoted to a bearing 11 and isprovided with a roller cl2. As the gear Il rotates, a cam 7L, Figs. 1,5, and 10, upon it encounters the roller i12 and causes the bell-crankto turn on its pivot el, and the rock-shaft and cam t4 thereby to turnand effect the opening apart of the arms I2 I3. As soon as the cam h4passes the bell-crank i9, the spring t3 acts, as described, to close thearms I2 I3 toward each other. The movements of the grinding mechanismand the movements of the clamping mechanism, above described, aresuitably synchronized.

The chute closing mechanism-As the sheaves successively drop intoposition to be clamped and ground, provision is made for arresting andholding them at the proper level until firmly stamped and ground. Forthis purpose a gate J, Figs. 1 and 5, is employed. The gate is hung onthe shaft G and is' movable longitudinally thereon to enable its arm jto close the chute, as represented in Fig. 5, and to be withdrawn toopen the chute. A cam j', upon the gear II, encounters in the rotationof the gear a thrust-bolt jz, which works through a bearing f and isfast- Iool TIO

cned to the arm j" of the gate and causes the gate to be closed. After'the cam j passes the thrust-bolt the spring 4which leads from thegate-army'4 to a bearingj, acts to open the gate. As the lowest sheavein the chute is discharged therefrom, it is desirable to prevent thesucceeding sheaves from dropping into the chute until the gate is againabout to close. Accordingly a pin K, Fig. 5, is operated to move outwardin the bearings 7o and encounter and bind that sheave which is next tothe sheave being discharged when the gate is opened.

The pin K is preferably operated, as described, in the following manner:Arms K K, Figs. 5 and G, which are pivoted at Y2 Vto a fixed bearing,are jointed at the lower end to the gate J and at the upper end to links7a3 7a2, Fig. (5, which in turn are jointed to a block 751, attached tothe pin K. Then wh en the gate is withdrawn to open the chute the arms7u are turned on their pivot and the pin K is thereby moved outward tobind the shcave.

The grinding-wheel adjustment-As the wheels I I wear away, provision ismade for adjusting the wheel-arms I2 I:3 to compensate for the wear. Thecam ytl upon the rock-shaft fil, instead of acting directly upon thearms I2 I, is adapted to encounter an adjustable shoulder L, Figs. l andupon the arms I2 I2. There being two arms I2 and I2, the cam I4 is atwo-part one, as shown, and the parts are adapted to respectively actupon the arms I2 and I3, and each arm is provided with a shoulder L. Theshoulder is adapted to be moved in a groove Z in the arm toward and fromthe rock-shaft and to be held at any desired point of adjustment.

The means shown for shipping the shoulder L are as follows: A shaft Z',Figs. l, 22, and 23, j ournaled in a bearing Z2, is provided with a wormZ2, which engages with a gear-nut Z4 upon a screw Z5, which is attachedto the shoulder L. By rotating the shaft l the shoulder is adjusted uponthe arm I2. That one of the grinding-wheels which is used to grind thesheave-face at the sides of the groove therein must have a lateral play,in order that the wheel-face shall wear evenly. To this end the wheel Iis not attached directly to its shaft 20, Figs. I3 and I5, but to asleeve 21, which is feathered on the shaft, to be moved longitudinallyupon and to rotate with the shaft, and is provided with a camgroove 22,Figs. I3 and 15, in which a clutchlever 23, Fig. 9, engages. Then as thewheelshaft 20 rotates, the clutch-lever, by mechanism not shown,operates to shift the sleeve reciprocatingly upon the shaft 20, andthereby to shift the wheel I to and fro, as indicated by its twopositions, shown respectively in Figs. 13 and 15.

The dri/umg meczanisnt-Power is communicated to the machine by means ofthe pulley M, Figs. 2G and 27, which is fast upon the shaft m, which inturn is provided with the bevel-gear Int and the cone-pulley m2, bywhich means the rotation of the shaft m is transmitted in two differentdirections. The gear m drives a bevel-gear f upon the upright shaft F,Figs. 26, 27, l, and 2, upon whose upper end is the pinion D, whichdrives the gear'D. The cone-pulley m2, by means of a belt m2,communicates its motion to a conepulley mi, Fig. l, which is fast upon ahorizontal shaft m5. This last-named shaft is provided with abevel-pinion m6, which drives a bevel-pinion O, fast upon the uprightshaft F., Figs. l, 2, 3, and 4. This shaft at its upper end, as stated,provides a bearing for the gear D to be turned thereon, and beneath thehopper A the shaft has fastened to it the bevelgear I), Figs. 3, l, and5. This last-named gear, therefore, rotates with its shaft E and serves,through the bevel-pinion q, to drive the horizontal shaft Q, 5 and 9.The shaft Q is provided with a pulley q,from which belts q2 lead to andaround the pulleys q2 q2, Fig. 9, upon the wheelshafts @'20 t2"respectively. The grinding-wheels are thereby driven from the shaft Q.The belts are respectively carried past idler-pulleys q* q and around awheel-shaft pulley q2, as shown. In this'manner the grinding mechanismis driven. The mechanism Q, q, the., is duplicated for each grindingmechanism. The upright shaft F is also provided with a bevel-gear f2,which drives,through the medium of a bevel-pinion r, Fig. l, a shaft R,having a worm ai", which engages with and drives a horizontal gear r2,Figs. l and 3. This last-named gear and the gear II, above described,are both fastened upon an upright sleeve S, j ournaled upon the bearings, Fig. The gear II therebyis driven from the shaft F, and its motion inturn eifeets the rotation of the clamp-shafts G', Figs. l and 5, as wellas the other various movements above set forth.

I claim- 1. The combination of the hopper, the series of chutes, theshafts E F, the pinion D', and the gear D, having the lingers d d,substantially as described.

2. The combination of the chute, the shafts G G g", the pinion g, thebracket g, the gear II, and the gears gT g2 g Q12, substantially asdescribed.

The combination of the gear II, the cam 71., the roller h', the stud h2,the box 7L, the shaft g2, the arm g, the bracket g4, and the spring gw,substantially as described.

a. The combination of the chute, the wheels I I', and the journaled armsI2 I2, substantially as described.

5. The combination of the clamping-shafts G r and the grinding-wheels,one of said shafts being adjustable toward and from the other and bothof them being rotatory, and said wheels being held in arms capable ofbeing moved toward and from each other, substantially as described.

(5. The combination of the chute, the grind- IOO IIO

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ing-Wheels and their journaled arms, the spring i3, and the cam @"1 andits shaft, substantially as described.

7 The combination of the chute, the grinding-wheels and their journaledarms opening apart from and closing' toward each other, as described,the clamping-shafts, and the chutegate, one of said shafts beingadjustable toward and from the other, and both of the shafts bein@rotator f and said 0fate bein" b 9 C C made to close and open saidchute, substantially as described.

8. The combination of the gear ll, the cam h4, the roller i12, thebell-crank il, the journaled arms I2 I3, the rock-shaft 5, the cam 4,the spring' i3, the crank ill, and the rod '138, substantially asdescribed.

9. The combination of the gear H, the cam j', the thrust-boltjz, thespring` the'gate J, and the chute, substantially as described.

lO. The combination of the grinding-wheels and their arms, theadjustable shoulders L, and the rock-shattand cam il, and spring is,substantially as described.

1l. The combination of the arm I2, the adj ustable shoulder L, the shaftZ, the Worm Z3, the nut Z4, and the screw Z5, substantially asdescribed.

l2. The combination of the grinding-Wheels and the arms l2 13, one ofsaid Wheels being` adjustable laterally to enable it to Wear evenly,substantially as described.

13. The combination of the shaft E, the gears P q, the shaft Q, thepulley q Q3 Q3, the belts q?, and the arms l2 I3, substantially asdescribed.

14. The combination of the shafts R F, the gear r2 f2 Il, the pinion fr,the Worm 0', and the sleeve S, and its bearing, substantially asdescribed fitness my hand this 3d day of November, A. D. 1888.

HERMAN C. STIFEL.

lVitnesses:

C. D. MOODY, B. F. REX.

